github.com/projectcontour/contour@v1.28.2/site/content/docs/v1.15.1/troubleshooting/contour-graph.md (about)

     1  # Visualizing Contour's Internal Object Graph
     2  
     3  Contour models its configuration using a directed acyclic graph (DAG) of internal objects.
     4  This can be visualized through a debug endpoint that outputs the DAG in [DOT][2] format.
     5  To visualize the graph, you must have [`graphviz`][3] installed on your system.
     6  
     7  To download the graph and save it as a PNG:
     8  
     9  ```bash
    10  # Port forward into the contour pod
    11  $ CONTOUR_POD=$(kubectl -n projectcontour get pod -l app=contour -o name | head -1)
    12  # Do the port forward to that pod
    13  $ kubectl -n projectcontour port-forward $CONTOUR_POD 6060
    14  # Download and store the DAG in png format
    15  $ curl localhost:6060/debug/dag | dot -T png > contour-dag.png
    16  ```
    17  
    18  The following is an example of a DAG that maps `http://kuard.local:80/` to the
    19  `kuard` service in the `default` namespace:
    20  
    21  ![Sample DAG][4]
    22  
    23  [2]: https://en.wikipedia.org/wiki/DOT
    24  [3]: https://graphviz.gitlab.io/
    25  [4]: /img/kuard-dag.png